1020220101 has 12 divisors (see below), whose sum is σ = 1488844812. Its totient is φ = 673134336.

The previous prime is 1020220081. The next prime is 1020220109. The reversal of 1020220101 is 1010220201.

It can be written as a sum of positive squares in 2 ways, for example, as 427248900 + 592971201 = 20670^2 + 24351^2 .

It is not a de Polignac number, because 1020220101 - 2⁷ = 1020219973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020220109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583446 + ... + 585191.

It is an arithmetic number, because the mean of its divisors is an integer number (124070401).

Almost surely, 2^1020220101 is an apocalyptic number.

It is an amenable number.

1020220101 is a deficient number, since it is larger than the sum of its proper divisors (468624711).

1020220101 is a wasteful number, since it uses less digits than its factorization.

1020220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168740 (or 1168737 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1020220101 is about 31940.8844742909. The cubic root of 1020220101 is about 1006.6951091453.

Adding to 1020220101 its reverse (1010220201), we get a palindrome (2030440302).

It can be divided in two parts, 10202 and 20101, that added together give a palindrome (30303).

The spelling of 1020220101 in words is "one billion, twenty million, two hundred twenty thousand, one hundred one".