1202120020 has 24 divisors (see below), whose sum is σ = 2529090144. Its totient is φ = 479964576.

The previous prime is 1202119999. The next prime is 1202120021. The reversal of 1202120020 is 200212021.

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 = 1202119979 and 1202120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44002 + ... + 65881.

It is an arithmetic number, because the mean of its divisors is an integer number (105378756).

Almost surely, 2^1202120020 is an apocalyptic number.

1202120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202120020 is an abundant number, since it is smaller than the sum of its proper divisors (1326970124).

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

1202120020 is a wasteful number, since it uses less digits than its factorization.

1202120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110439 (or 110437 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1202120020 is about 34671.6025011824. The cubic root of 1202120020 is about 1063.2839947452.

Adding to 1202120020 its reverse (200212021), we get a palindrome (1402332041).

It can be divided in two parts, 12021 and 20020, that added together give a square (32041 = 179²).

The spelling of 1202120020 in words is "one billion, two hundred two million, one hundred twenty thousand, twenty".