21001002102022 has 32 divisors (see below), whose sum is σ = 33783105316032. Its totient is φ = 9765678472704.

The previous prime is 21001002101951. The next prime is 21001002102023. The reversal of 21001002102022 is 22020120010012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21001002101993 and 21001002102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001002102023) 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, 1866343 + ... + 6744274.

It is an arithmetic number, because the mean of its divisors is an integer number (1055722041126).

Almost surely, 2^{21001002102022} is an apocalyptic number.

21001002102022 is a deficient number, since it is larger than the sum of its proper divisors (12782103214010).

21001002102022 is a wasteful number, since it uses less digits than its factorization.

21001002102022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8612112.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21001002102022 its reverse (22020120010012), we get a palindrome (43021122112034).

The spelling of 21001002102022 in words is "twenty-one trillion, one billion, two million, one hundred two thousand, twenty-two".