121022101001020 has 96 divisors (see below), whose sum is σ = 261605323026432. Its totient is φ = 47001879687168.

The previous prime is 121022101000967. The next prime is 121022101001029. The reversal of 121022101001020 is 20100101220121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022101001029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215992149 + ... + 216551731.

It is an arithmetic number, because the mean of its divisors is an integer number (2725055448192).

Almost surely, 2^{121022101001020} is an apocalyptic number.

121022101001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121022101001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130802661513216).

121022101001020 is an abundant number, since it is smaller than the sum of its proper divisors (140583222025412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121022101001020 is a wasteful number, since it uses less digits than its factorization.

121022101001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561131 (or 561129 counting only the distinct ones).

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

Adding to 121022101001020 its reverse (20100101220121), we get a palindrome (141122202221141).

The spelling of 121022101001020 in words is "one hundred twenty-one trillion, twenty-two billion, one hundred one million, one thousand, twenty".