20200121121011 has 32 divisors (see below), whose sum is σ = 23326577971200. Its totient is φ = 17326248675840.

The previous prime is 20200121120999. The next prime is 20200121121107. The reversal of 20200121121011 is 11012112100202.

It is not a de Polignac number, because 20200121121011 - 2⁶ = 20200121120947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200121181011) 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, 502083266 + ... + 502123496.

It is an arithmetic number, because the mean of its divisors is an integer number (728955561600).

Almost surely, 2^{20200121121011} is an apocalyptic number.

20200121121011 is a deficient number, since it is larger than the sum of its proper divisors (3126456850189).

20200121121011 is a wasteful number, since it uses less digits than its factorization.

20200121121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69099.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20200121121011 its reverse (11012112100202), we get a palindrome (31212233221213).

The spelling of 20200121121011 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".