1012101021949 has 2 divisors, whose sum is σ = 1012101021950. Its totient is φ = 1012101021948.

The previous prime is 1012101021929. The next prime is 1012101022027. The reversal of 1012101021949 is 9491201012101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011949485849 + 151536100 = 1005957^2 + 12310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012101021949 - 2⁷ = 1012101021821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012101021949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012101021929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506050510974 + 506050510975.

It is an arithmetic number, because the mean of its divisors is an integer number (506050510975).

Almost surely, 2^{1012101021949} is an apocalyptic number.

It is an amenable number.

1012101021949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012101021949 is an equidigital number, since it uses as much as digits as its factorization.

1012101021949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 1012101021949 in words is "one trillion, twelve billion, one hundred one million, twenty-one thousand, nine hundred forty-nine".