1020203021101 has 16 divisors (see below), whose sum is σ = 1115796306240. Its totient is φ = 925085096320.

The previous prime is 1020203021081. The next prime is 1020203021137. The reversal of 1020203021101 is 1011203020201.

It is not a de Polignac number, because 1020203021101 - 2⁹ = 1020203020589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020203021161) 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, 33137151 + ... + 33167923.

It is an arithmetic number, because the mean of its divisors is an integer number (69737269140).

Almost surely, 2^{1020203021101} is an apocalyptic number.

1020203021101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020203021101 is a deficient number, since it is larger than the sum of its proper divisors (95593285139).

1020203021101 is a wasteful number, since it uses less digits than its factorization.

1020203021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38396.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1020203021101 its reverse (1011203020201), we get a palindrome (2031406041302).

The spelling of 1020203021101 in words is "one trillion, twenty billion, two hundred three million, twenty-one thousand, one hundred one".