21000401212202 has 16 divisors (see below), whose sum is σ = 32603229660960. Its totient is φ = 10133022440688.

The previous prime is 21000401212181. The next prime is 21000401212207. The reversal of 21000401212202 is 20221210400012.

It is a super-3 number, since 3×21000401212202³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21000401212207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90995948 + ... + 91226439.

It is an arithmetic number, because the mean of its divisors is an integer number (2037701853810).

Almost surely, 2^{21000401212202} is an apocalyptic number.

21000401212202 is a deficient number, since it is larger than the sum of its proper divisors (11602828448758).

21000401212202 is a wasteful number, since it uses less digits than its factorization.

21000401212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182224405.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21000401212202 its reverse (20221210400012), we get a palindrome (41221611612214).

The spelling of 21000401212202 in words is "twenty-one trillion, four hundred one million, two hundred twelve thousand, two hundred two".