121020021001011 has 16 divisors (see below), whose sum is σ = 176078415696768. Its totient is φ = 73324928006400.

The previous prime is 121020021000953. The next prime is 121020021001031. The reversal of 121020021001011 is 110100120020121.

It is not a de Polignac number, because 121020021001011 - 2²² = 121020016806707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121020021001031) 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, 513362046 + ... + 513597731.

It is an arithmetic number, because the mean of its divisors is an integer number (11004900981048).

Almost surely, 2^{121020021001011} is an apocalyptic number.

121020021001011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121020021001011 is a deficient number, since it is larger than the sum of its proper divisors (55058394695757).

121020021001011 is a wasteful number, since it uses less digits than its factorization.

121020021001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026963362.

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

Adding to 121020021001011 its reverse (110100120020121), we get a palindrome (231120141021132).

The spelling of 121020021001011 in words is "one hundred twenty-one trillion, twenty billion, twenty-one million, one thousand, eleven".