1011202012021 has 2 divisors, whose sum is σ = 1011202012022. Its totient is φ = 1011202012020.

The previous prime is 1011202012001. The next prime is 1011202012031. The reversal of 1011202012021 is 1202102021101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990691762225 + 20510249796 = 995335^2 + 143214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011202012021 - 2²³ = 1011193623413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011202011992 and 1011202012010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011202012001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505601006010 + 505601006011.

It is an arithmetic number, because the mean of its divisors is an integer number (505601006011).

Almost surely, 2^{1011202012021} is an apocalyptic number.

It is an amenable number.

1011202012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011202012021 is an equidigital number, since it uses as much as digits as its factorization.

1011202012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1011202012021 its reverse (1202102021101), we get a palindrome (2213304033122).

The spelling of 1011202012021 in words is "one trillion, eleven billion, two hundred two million, twelve thousand, twenty-one".