21012000020122 has 32 divisors (see below), whose sum is σ = 33014503425024. Its totient is φ = 10017449366400.

The previous prime is 21012000020107. The next prime is 21012000020147. The reversal of 21012000020122 is 22102000021012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1976172 + ... + 6777112.

It is an arithmetic number, because the mean of its divisors is an integer number (1031703232032).

Almost surely, 2^{21012000020122} is an apocalyptic number.

21012000020122 is a deficient number, since it is larger than the sum of its proper divisors (12002503404902).

21012000020122 is a wasteful number, since it uses less digits than its factorization.

21012000020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4802014.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21012000020122 its reverse (22102000021012), we get a palindrome (43114000041134).

The spelling of 21012000020122 in words is "twenty-one trillion, twelve billion, twenty thousand, one hundred twenty-two".