1202021000010 has 48 divisors (see below), whose sum is σ = 3130865600616. Its totient is φ = 319963446144.

The previous prime is 1202020999987. The next prime is 1202021000017. The reversal of 1202021000010 is 100001202021.

It can be written as a sum of positive squares in 4 ways, for example, as 251846396649 + 950174603361 = 501843^2 + 974769^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1202020999956 and 1202021000001.

It is not an unprimeable number, because it can be changed into a prime (1202021000017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11938909 + ... + 12039168.

Almost surely, 2^{1202021000010} is an apocalyptic number.

1202021000010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1202021000010 is an abundant number, since it is smaller than the sum of its proper divisors (1928844600606).

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

1202021000010 is a wasteful number, since it uses less digits than its factorization.

1202021000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23978647 (or 23978644 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1202021000010 its reverse (100001202021), we get a palindrome (1302022202031).

The spelling of 1202021000010 in words is "one trillion, two hundred two billion, twenty-one million, ten", and thus it is an aban number.