1202111020 has 96 divisors (see below), whose sum is σ = 2830899456. Its totient is φ = 425068800.

The previous prime is 1202110979. The next prime is 1202111023. The reversal of 1202111020 is 201112021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1202110988 and 1202111006.

It is not an unprimeable number, because it can be changed into a prime (1202111023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1527067 + ... + 1527853.

It is an arithmetic number, because the mean of its divisors is an integer number (29488536).

Almost surely, 2^1202111020 is an apocalyptic number.

1202111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1202111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415449728).

1202111020 is an abundant number, since it is smaller than the sum of its proper divisors (1628788436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1202111020 is a wasteful number, since it uses less digits than its factorization.

1202111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1202111020 is about 34671.4727117266. The cubic root of 1202111020 is about 1063.2813412165.

Adding to 1202111020 its reverse (201112021), we get a palindrome (1403223041).

The spelling of 1202111020 in words is "one billion, two hundred two million, one hundred eleven thousand, twenty".