21121210022 has 8 divisors (see below), whose sum is σ = 34561980072. Its totient is φ = 9600550000.

The previous prime is 21121210007. The next prime is 21121210037. The reversal of 21121210022 is 22001212112.

It is an interprime number because it is at equal distance from previous prime (21121210007) and next prime (21121210037).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21121210022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121209979 and 21121210006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480027479 + ... + 480027522.

It is an arithmetic number, because the mean of its divisors is an integer number (4320247509).

Almost surely, 2^21121210022 is an apocalyptic number.

21121210022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121210022 is a deficient number, since it is larger than the sum of its proper divisors (13440770050).

21121210022 is a wasteful number, since it uses less digits than its factorization.

21121210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960055014.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121210022 its reverse (22001212112), we get a palindrome (43122422134).

The spelling of 21121210022 in words is "twenty-one billion, one hundred twenty-one million, two hundred ten thousand, twenty-two".