1021102011 has 8 divisors (see below), whose sum is σ = 1512743760. Its totient is φ = 680734656.

The previous prime is 1021102003. The next prime is 1021102051. The reversal of 1021102011 is 1102011201.

It is a happy number.

It is not a de Polignac number, because 1021102011 - 2³ = 1021102003 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1021101984 and 1021102002.

It is not an unprimeable number, because it can be changed into a prime (1021102051) 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, 18909270 + ... + 18909323.

It is an arithmetic number, because the mean of its divisors is an integer number (189092970).

Almost surely, 2^1021102011 is an apocalyptic number.

1021102011 is a deficient number, since it is larger than the sum of its proper divisors (491641749).

1021102011 is an equidigital number, since it uses as much as digits as its factorization.

1021102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37818602 (or 37818596 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1021102011 is about 31954.6868393355. The cubic root of 1021102011 is about 1006.9850984614.

Adding to 1021102011 its reverse (1102011201), we get a palindrome (2123113212).

The spelling of 1021102011 in words is "one billion, twenty-one million, one hundred two thousand, eleven".