21202012121222 has 8 divisors (see below), whose sum is σ = 31803040652472. Its totient is φ = 10600998570400.

The previous prime is 21202012121177. The next prime is 21202012121231. The reversal of 21202012121222 is 22212121020212.

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

It is a super-2 number, since 2×21202012121222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202012121194 and 21202012121203.

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, 991097 + ... + 6586827.

It is an arithmetic number, because the mean of its divisors is an integer number (3975380081559).

Almost surely, 2^{21202012121222} is an apocalyptic number.

21202012121222 is a deficient number, since it is larger than the sum of its proper divisors (10601028531250).

21202012121222 is a wasteful number, since it uses less digits than its factorization.

21202012121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490214.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21202012121222 its reverse (22212121020212), we get a palindrome (43414133141434).

The spelling of 21202012121222 in words is "twenty-one trillion, two hundred two billion, twelve million, one hundred twenty-one thousand, two hundred twenty-two".