1021011210021 has 8 divisors (see below), whose sum is σ = 1485107214624. Its totient is φ = 618794672720.

The previous prime is 1021011210017. The next prime is 1021011210041. The reversal of 1021011210021 is 1200121101201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021011210021 - 2² = 1021011210017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021011209979 and 1021011210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021011210041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15469866786 + ... + 15469866851.

It is an arithmetic number, because the mean of its divisors is an integer number (185638401828).

Almost surely, 2^{1021011210021} is an apocalyptic number.

1021011210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021011210021 is a deficient number, since it is larger than the sum of its proper divisors (464096004603).

1021011210021 is a wasteful number, since it uses less digits than its factorization.

1021011210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30939733651.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021011210021 its reverse (1200121101201), we get a palindrome (2221132311222).

The spelling of 1021011210021 in words is "one trillion, twenty-one billion, eleven million, two hundred ten thousand, twenty-one".