1011212212021 has 16 divisors (see below), whose sum is σ = 1111698187776. Its totient is φ = 912154230000.

The previous prime is 1011212211983. The next prime is 1011212212037. The reversal of 1011212212021 is 1202122121101.

It is a cyclic number.

It is not a de Polignac number, because 1011212212021 - 2²⁵ = 1011178657589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011212211986 and 1011212212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212212081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13061536 + ... + 13138726.

It is an arithmetic number, because the mean of its divisors is an integer number (69481136736).

Almost surely, 2^{1011212212021} is an apocalyptic number.

1011212212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011212212021 is a deficient number, since it is larger than the sum of its proper divisors (100485975755).

1011212212021 is a wasteful number, since it uses less digits than its factorization.

1011212212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86424.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1011212212021 its reverse (1202122121101), we get a palindrome (2213334333122).

The spelling of 1011212212021 in words is "one trillion, eleven billion, two hundred twelve million, two hundred twelve thousand, twenty-one".