20010122121099 has 32 divisors (see below), whose sum is σ = 30944134024704. Its totient is φ = 11381201511680.

The previous prime is 20010122121061. The next prime is 20010122121103. The reversal of 20010122121099 is 99012122101002.

It is not a de Polignac number, because 20010122121099 - 2⁷ = 20010122120971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20010122121049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248674842 + ... + 248755295.

It is an arithmetic number, because the mean of its divisors is an integer number (967004188272).

Almost surely, 2^{20010122121099} is an apocalyptic number.

20010122121099 is a deficient number, since it is larger than the sum of its proper divisors (10934011903605).

20010122121099 is a wasteful number, since it uses less digits than its factorization.

20010122121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497430227.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 20010122121099 in words is "twenty trillion, ten billion, one hundred twenty-two million, one hundred twenty-one thousand, ninety-nine".