1201021010010 has 64 divisors (see below), whose sum is σ = 3238708406400. Its totient is φ = 316673698176.

The previous prime is 1201021009997. The next prime is 1201021010089. The reversal of 1201021010010 is 100101201021.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1201021009974 and 1201021010001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24966004 + ... + 25014063.

It is an arithmetic number, because the mean of its divisors is an integer number (50604818850).

Almost surely, 2^{1201021010010} is an apocalyptic number.

1201021010010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201021010010 is an abundant number, since it is smaller than the sum of its proper divisors (2037687396390).

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

1201021010010 is a wasteful number, since it uses less digits than its factorization.

1201021010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49980172 (or 49980166 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1201021010010 its reverse (100101201021), we get a palindrome (1301122211031).

The spelling of 1201021010010 in words is "one trillion, two hundred one billion, twenty-one million, ten thousand, ten".