22012101021961 has 2 divisors, whose sum is σ = 22012101021962. Its totient is φ = 22012101021960.

The previous prime is 22012101021949. The next prime is 22012101022081. The reversal of 22012101021961 is 16912010121022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15166787535936 + 6845313486025 = 3894456^2 + 2616355^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012101021961 - 2¹³ = 22012101013769 is a prime.

It is not a weakly prime, because it can be changed into another prime (22012101024961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006050510980 + 11006050510981.

It is an arithmetic number, because the mean of its divisors is an integer number (11006050510981).

Almost surely, 2^{22012101021961} is an apocalyptic number.

It is an amenable number.

22012101021961 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012101021961 is an equidigital number, since it uses as much as digits as its factorization.

22012101021961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

Adding to 22012101021961 its reverse (16912010121022), we get a palindrome (38924111142983).

The spelling of 22012101021961 in words is "twenty-two trillion, twelve billion, one hundred one million, twenty-one thousand, nine hundred sixty-one".