12021021010 has 16 divisors (see below), whose sum is σ = 21852075672. Its totient is φ = 4760800000.

The previous prime is 12021021007. The next prime is 12021021031. The reversal of 12021021010 is 1012012021.

It can be written as a sum of positive squares in 4 ways, for example, as 11551735441 + 469285569 = 107479^2 + 21663^2 .

It is a super-2 number, since 2×12021021010² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5949991 + ... + 5952010.

Almost surely, 2^12021021010 is an apocalyptic number.

12021021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021021010 is a deficient number, since it is larger than the sum of its proper divisors (9831054662).

12021021010 is a wasteful number, since it uses less digits than its factorization.

12021021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11902109.

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

Adding to 12021021010 its reverse (1012012021), we get a palindrome (13033033031).

The spelling of 12021021010 in words is "twelve billion, twenty-one million, twenty-one thousand, ten".