21121022002201 has 16 divisors (see below), whose sum is σ = 24408266492160. Its totient is φ = 18062727950080.

The previous prime is 21121022002181. The next prime is 21121022002217. The reversal of 21121022002201 is 10220022012112.

It is a happy number.

It is not a de Polignac number, because 21121022002201 - 2¹⁵ = 21121021969433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121022002261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26908081 + ... + 27681886.

It is an arithmetic number, because the mean of its divisors is an integer number (1525516655760).

Almost surely, 2^{21121022002201} is an apocalyptic number.

It is an amenable number.

21121022002201 is a deficient number, since it is larger than the sum of its proper divisors (3287244489959).

21121022002201 is a wasteful number, since it uses less digits than its factorization.

21121022002201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54592064.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21121022002201 its reverse (10220022012112), we get a palindrome (31341044014313).

It can be divided in two parts, 2112 and 1022002201, that multiplied together give a palindrome (2158468648512).

The spelling of 21121022002201 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, two thousand, two hundred one".