10121122981 has 2 divisors, whose sum is σ = 10121122982. Its totient is φ = 10121122980.

The previous prime is 10121122943. The next prime is 10121123029. The reversal of 10121122981 is 18922112101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8725428100 + 1395694881 = 93410^2 + 37359^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121122981 - 2¹³ = 10121114789 is a prime.

It is a super-2 number, since 2×10121122981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121122181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060561490 + 5060561491.

It is an arithmetic number, because the mean of its divisors is an integer number (5060561491).

Almost surely, 2^10121122981 is an apocalyptic number.

It is an amenable number.

10121122981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121122981 is an equidigital number, since it uses as much as digits as its factorization.

10121122981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 10121122981 in words is "ten billion, one hundred twenty-one million, one hundred twenty-two thousand, nine hundred eighty-one".