21203000020122 has 16 divisors (see below), whose sum is σ = 42942784851840. Its totient is φ = 6978202538112.

The previous prime is 21203000020099. The next prime is 21203000020157. The reversal of 21203000020122 is 22102000030212.

It is a happy number.

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, 22366033303 + ... + 22366034250.

It is an arithmetic number, because the mean of its divisors is an integer number (2683924053240).

Almost surely, 2^{21203000020122} is an apocalyptic number.

21203000020122 is an abundant number, since it is smaller than the sum of its proper divisors (21739784831718).

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

21203000020122 is a wasteful number, since it uses less digits than its factorization.

21203000020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44732067637.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21203000020122 its reverse (22102000030212), we get a palindrome (43305000050334).

The spelling of 21203000020122 in words is "twenty-one trillion, two hundred three billion, twenty thousand, one hundred twenty-two".